Annotations: 3BQE

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Peptide methionine sulfoxide reductase	8081987	3001262	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PMSR	e3bqeA1	A: a+b two layers	X: Alpha-beta plaits	H: HMA-related	T: Peptide methionine sulfoxide reductase	F: PMSR	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.1060.10	Alpha Beta	2-Layer Sandwich	Peptide Methionine Sulfoxide Reductase	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01625	Peptide methionine sulfoxide reductase (PMSR)	Peptide methionine sulfoxide reductase	This enzyme repairs damaged proteins. Methionine sulfoxide in proteins is reduced to methionine.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Peptide methionine sulfoxide reductase msrA/msrB	oxidoreductase activity, acting on a sulfur group of donors oxidoreductase activity oxidoreductase activity, acting on a sulfur group of donors, disulfide as acceptor catalytic activity peptide-methionine (R)-S-oxide reductase activity peptide-methionine (S)-S-oxide reductase activity L-methionine-(S)-S-oxide reductase activity L-methionine:thioredoxin-disulfide S-oxidoreductase activity	macromolecule modification metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process protein modification process cellular response to stimulus response to oxidative stress cellular response to chemical stimulus response to stimulus cellular response to stress response to stress response to chemical macromolecule modification metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process protein modification process cellular response to stimulus response to oxidative stress cellular response to chemical stimulus response to stimulus cellular response to stress response to stress response to chemical cellular response to oxidative stress cellular response to chemical stress	cellular anatomical structure intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002569	Peptide methionine sulphoxide reductase MsrA domain	Domain
A	IPR036509	Peptide methionine sulphoxide reductase MsrA superfamily	Homologous Superfamily
A	IPR013766	Thioredoxin domain	Domain
A	IPR011057	Mss4-like superfamily	Homologous Superfamily
A	IPR050162	Methionine Sulfoxide Reductase A	Family
A	IPR013740	Redoxin	Domain
A	IPR036249	Thioredoxin-like superfamily	Homologous Superfamily
A	IPR002579	Peptide methionine sulphoxide reductase MrsB domain	Domain

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.